ClickHouse/tests/integration/test_distributed_respect_user_timeouts/test.py

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import itertools
import os.path
import timeit
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import pytest
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import logging
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from helpers.cluster import ClickHouseCluster
from helpers.network import PartitionManager
from helpers.test_tools import TSV
cluster = ClickHouseCluster(__file__)
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NODES = {'node' + str(i): None for i in (1, 2)}
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IS_DEBUG = False
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CREATE_TABLES_SQL = '''
CREATE DATABASE test;
CREATE TABLE base_table(
node String
)
ENGINE = MergeTree
PARTITION BY node
ORDER BY node;
CREATE TABLE distributed_table
ENGINE = Distributed(test_cluster, default, base_table) AS base_table;
'''
INSERT_SQL_TEMPLATE = "INSERT INTO base_table VALUES ('{node_id}')"
SELECTS_SQL = {
'distributed': 'SELECT node FROM distributed_table ORDER BY node',
'remote': ("SELECT node FROM remote('node1,node2', default.base_table) "
"ORDER BY node"),
}
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EXCEPTION_NETWORK = 'DB::NetException: '
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EXCEPTION_TIMEOUT = 'Timeout exceeded while reading from socket ('
EXCEPTION_CONNECT = 'Timeout: connect timed out: '
TIMEOUT_MEASUREMENT_EPS = 0.01
EXPECTED_BEHAVIOR = {
'default': {
'times': 3,
'timeout': 1,
},
'ready_to_wait': {
'times': 5,
'timeout': 3,
},
}
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TIMEOUT_DIFF_UPPER_BOUND = {
'default': {
'distributed': 5.5,
'remote': 2.5,
},
'ready_to_wait': {
'distributed': 3,
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'remote': 2.0,
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},
}
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def _check_exception(exception, expected_tries=3):
lines = exception.split('\n')
assert len(lines) > 4, "Unexpected exception (expected: timeout info)"
assert lines[0].startswith('Received exception from server (version')
assert lines[1].startswith('Code: 279')
assert lines[1].endswith('All connection tries failed. Log: ')
assert lines[2] == '', "Unexpected exception text (expected: empty line)"
for i, line in enumerate(lines[3:3 + expected_tries]):
expected_lines = (
'Code: 209. ' + EXCEPTION_NETWORK + EXCEPTION_TIMEOUT,
'Code: 209. ' + EXCEPTION_NETWORK + EXCEPTION_CONNECT,
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EXCEPTION_TIMEOUT,
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)
assert any(line.startswith(expected) for expected in expected_lines), \
'Unexpected exception "{}" at one of the connection attempts'.format(line)
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assert lines[3 + expected_tries] == '', 'Wrong number of connect attempts'
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@pytest.fixture(scope="module", params=["configs", "configs_secure"])
def started_cluster(request):
cluster = ClickHouseCluster(__file__)
cluster.__with_ssl_config = request.param == "configs_secure"
main_configs = []
main_configs += [os.path.join(request.param, "config.d/remote_servers.xml")]
if cluster.__with_ssl_config:
main_configs += [os.path.join(request.param, "server.crt")]
main_configs += [os.path.join(request.param, "server.key")]
main_configs += [os.path.join(request.param, "dhparam.pem")]
main_configs += [os.path.join(request.param, "config.d/ssl_conf.xml")]
user_configs = [os.path.join(request.param, "users.d/set_distributed_defaults.xml")]
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for name in NODES:
NODES[name] = cluster.add_instance(name, main_configs=main_configs, user_configs=user_configs)
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try:
cluster.start()
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if cluster.instances["node1"].is_debug_build():
global IS_DEBUG
IS_DEBUG = True
logging.warning("Debug build is too slow to show difference in timings. We disable checks.")
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for node_id, node in list(NODES.items()):
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node.query(CREATE_TABLES_SQL)
node.query(INSERT_SQL_TEMPLATE.format(node_id=node_id))
yield cluster
finally:
cluster.shutdown()
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def _check_timeout_and_exception(node, user, query_base, query):
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repeats = EXPECTED_BEHAVIOR[user]['times']
extra_repeats = 1
# Table function remote() are executed two times.
# It tries to get table structure from remote shards.
# On 'node2' it will firstly try to get structure from 'node1' (which is not available),
# so there are 1 extra connection attempts for 'node2' and 'remote'
if node.name == 'node2' and query_base == 'remote':
extra_repeats = 2
expected_timeout = EXPECTED_BEHAVIOR[user]['timeout'] * repeats * extra_repeats
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start = timeit.default_timer()
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exception = node.query_and_get_error(query, user=user)
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# And it should timeout no faster than:
measured_timeout = timeit.default_timer() - start
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if not IS_DEBUG:
assert expected_timeout - measured_timeout <= TIMEOUT_MEASUREMENT_EPS
assert measured_timeout - expected_timeout <= TIMEOUT_DIFF_UPPER_BOUND[user][query_base]
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# And exception should reflect connection attempts:
_check_exception(exception, repeats)
@pytest.mark.parametrize(
('first_user', 'node_name', 'query_base'),
tuple(itertools.product(EXPECTED_BEHAVIOR, NODES, SELECTS_SQL)),
)
def test_reconnect(started_cluster, node_name, first_user, query_base):
node = NODES[node_name]
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query = SELECTS_SQL[query_base]
if started_cluster.__with_ssl_config:
query = query.replace('remote(', 'remoteSecure(')
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# Everything is up, select should work:
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assert TSV(node.query(query,
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user=first_user)) == TSV('node1\nnode2')
with PartitionManager() as pm:
# Break the connection.
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pm.partition_instances(*list(NODES.values()))
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# Now it shouldn't:
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_check_timeout_and_exception(node, first_user, query_base, query)
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# Other user should have different timeout and exception
_check_timeout_and_exception(
node,
'default' if first_user != 'default' else 'ready_to_wait',
query_base,
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query,
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)
# select should work again:
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assert TSV(node.query(query,
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user=first_user)) == TSV('node1\nnode2')